build: add cmake module for spdlog

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>

CMakeLists.txt

@@ -94,6 +94,9 @@ set(CMD_MAKE make)
 
 include(ExternalProject)
 
+# spdlog
+include(spdlog)
+
 # jq
 include(jq)
 

cmake/modules/spdlog.cmake

@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2020 The Falco Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+
+
+set(SPDLOG_PREFIX "${PROJECT_BINARY_DIR}/spdlog-prefix")
+set(SPDLOG_INCLUDE_DIR "${SPDLOG_PREFIX}/src/spdlog/include")
+message(STATUS "Using bundled spdlog in '${SPDLOG_INCLUDE_DIR}'")
+
+ExternalProject_Add(
+  spdlog
+  URL "https://github.com/gabime/spdlog/archive/v1.8.1.tar.gz"
+  URL_HASH "SHA256=5197b3147cfcfaa67dd564db7b878e4a4b3d9f3443801722b3915cdeced656cb"
+  BUILD_COMMAND ""
+  INSTALL_COMMAND ""
+)

userspace/falco/CMakeLists.txt

@@ -33,6 +33,7 @@ set(
   "${PROJECT_SOURCE_DIR}/userspace/engine"
   "${PROJECT_BINARY_DIR}/userspace/falco"
   "${PROJECT_BINARY_DIR}/driver/src"
+  "${SPDLOG_INCLUDE_DIR}"
   "${STRING_VIEW_LITE_INCLUDE}"
   "${YAMLCPP_INCLUDE_DIR}"
   "${CMAKE_CURRENT_BINARY_DIR}"
@@ -41,6 +42,7 @@ set(
 
 set(
   FALCO_DEPENDENCIES
+  spdlog
   string-view-lite
   libyaml
   b64